Torque stick for a rotary impact tool
US12251801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2024 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Apr 11, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0021
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of controlling a rotary impact tool includes activating a motor to provide torque to a drive assembly, providing rotational impacts to a torque stick coupled to an anvil of the drive assembly in response to a reaction torque on the drive assembly exceeding a threshold value, and sensing a position of the anvil with a position sensor. The position sensor transmits a first signal indicative of the anvil rotating in a first direction and a second signal indicative of the anvil rotating in a second direction, where the second direction is a rebound angle of the anvil. The method further includes calculating a torque transferred from the torque stick to a workpiece by multiplying the rebound angle by a torsional stiffness value of the torque stick and deactivating the motor in response to the torque exerted on the workpiece being substantially equal to a torque limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.